The Sunday Mirror can reveal she was there for blood tests to find the cause of agonising stomach problems that have left the Celebrity Big Brother beauty unable to eat, leading to worrying weight loss.

Concerned staff referred her to a specialist who immediately sent her to a nearby hospital, where she is due to stay until the baffling condition is under control.

A source revealed: “She’s in a really bad way and has been getting worse, not better. It’s very worrying. She’s lost over a stone and a half in weight and hasn’t been able to eat for over two weeks.

“Violent vomiting fits and attacks of diarrhoea are really taking it out of her and doctors are desperate to find the cause before it gets any worse.”

Last night Sam’s mum Suzanne Wells, 43, said: “I’ve been so worried about Sam and have not seen her this ill before. All her bones are sticking out and she’s very frail. I knew she wasn’t right in the house and she’s lost so much weight.

“I’ve been with her the whole time and she’s told me she’s in a lot of pain but we’re hoping to get to the bottom of this as soon as possible.”

The collapse came hours after Sam had appeared on ITV’s This Morning looking pale and thin.

(Photo: Twitter)

The source went on: “They’re running tests for everything. They are ruling out one thing at a time but they are conscious they need to act quickly as it could be something serious. It’s a really scary situation.”

The beauty, who came fifth in the live CBB final on Wednesday, became increasingly weak during her time in the house, baffling doctors with her symptoms.

The renowned party girl – who yesterday tweeted a picture of herself with a drip in her arm – was unfairly dubbed boring as she did not touch a drop of alcohol in the Big Brother house.

In her exit interview, she told presenter Emma Willis: “For two weeks I was ill in that house and on antibiotics. I can’t tell you how gutted I was. One night I was in bed crying, thinking, ‘What have I done? It’s the most amazing thing I’ve done in my life and I’m ill’.”

CBB docs gave Sam the OK to stay in the house. She was taken in for medical checks twice during the show, and was also visited in the house by doctors.

Her illness was not referenced on the Channel 5 show until the final episode when she thanked housemates for their support.

But friends and family claim she should have been admitted to hospital far sooner.

“The family are obviously worried,” the source added. “Her health should come first.”